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CU
COMPARGAL is a module which plots two or more galaxy surface brightness
or color distributions. Typical uses are for comparing an observed
distribution with a seeing convolved fitting function such as the de
Vaucouleurs formula.
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Enter an option: 25-NOV-1991 15:01:47.81
OPTION=CG
COMPARGAL, Version 3
Enter a command:
DD = Plots the normalized difference of integrated surface brightness
(ADU) between two data files against radius (default)
DF = Plots the normalized difference of integrated surface
brightness between two formulas
RD = Plots the normalized ratio of surface brightness (ADU) between
two data files
RF = Plots the normalized ratio of surface brightness between two formulas
CD = Plots the difference of surface brightness of two data files
(magnitude). Error bars and the predicted color from the Modified
Hubble and de Vaucouleurs formulas, which must exist as files
(magnitude), are added.
SD = Plots the simple difference of surface brightness of two
data files (magnitude or ADU)
TD = Plots the surface brightnesses (magnitude) of two files
simultaneously; error bars may be added to the first.
OD = Plots the surface brightness (magnitude) of one file; error bars may
be added.
COMMAND=CD ....We are going to plot the color distribution
and the predictions of seeing convolved
fitting formulas
Open the first data file
Enter the file name: (default = last entry)
FILE_21=M022152 ....This file, for the blue data, is of
type 1 and is in units of magnitudes
and arc seconds.
Enter the ID of the first object: (default = last entry)
ID=70
File M022152 does not begin at the center of the object
Open the second data file
Enter the file name: (default = last entry)
FILE_22=M022151 ....This is the red data
Enter the ID of the second object: (default = last entry for first object)
ID_2=
70 ....We took the default
File M022151 does not begin at the center of the object
Enter the starting and ending radii for the plot:
(default = the common range of the data files)
RADII=
-0.538000
1.94200 ....We took the default. This may
be too much if the data begins
to look noisy at large radii
Enter the readout noise in electrons and the gain in electrons per ADU:
(defaults = 63.9 21.3)
NOISE_PARAMETERS=
63.9000
21.3000
Enter the original sky levels for the two files:
SKIES=491.416 318.486 ....Units of ADU
Enter the sigmas of the skies of the two files:
SIGMA_SKY=0.051 0.031 ....Units of ADU
Enter the magnitude calibration constants for the two files:
CALIBRATIONS=27.4212 25.3366 ....The numbers added to -2.5*log(ADU)
Enter the plate scale in "/pixel: (default = 0.6298)
SCALE=
0.629800 ....The McGraw-Hill 1.3 m
Enter the smoothing factors: (defaults = 0.3 0.3)
SMOOTHING_FACTORS=
0.300000
0.300000 ....These are the factors that were
used in option ED
Enter the log(r)'s at which error bars are to be placed:
(default = none
log(r)'s=-0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
Open the first artificial data file for the modified Hubble formula
Enter the file name: (default = last entry)
FILE_23=M022152FM ....An artificial data file constructed
with option FG, the galaxy parameters,
and the point spread function. It
was then edited with option ED to put
it in units of magntiudes and
arc seconds.
Open the second artificial data file for the modified Hubble formula
Enter the file name: (default = last entry)
FILE_24=M022151FM ....Same, but for the red.
File M022152FM does not begin at the center of the object
File M022151FM does not begin at the center of the object
For the actual data and the formula:
Mean error = 0.12251 ....The program compared the data and
the formula
Open the first artificial data file for the de Vaucouleurs formula
Enter the file name: (default = last entry)
FILE_25=M022152FV ....Blue
Open the second artificial data file for the de Vaucouleurs formula
Enter the file name: (default = last entry)
FILE_26=M022151FV ....Red
File M022152FV does not begin at the center of the object
File M022151FV does not begin at the center of the object
For the actual data and the formula:
Mean error = 0.12952
Enter the title: (default = ID)
TITLE=Galaxy 70
Enter the plot devices:
G = Graphics terminal (VT100/Retrographics and Visual 550, default)
G1 = Graphics terminal (GraphOn)
G2 = Graphics terminal (Codonics)
G3 = Graphics terminal (Micro-term)
F = File
T = Tektronix 4662 flat bed plotter (1200 baud)
DEVICES=G
....We now inspect the plot. It is too noisy
at large radii. It is easy to repeat
everything with new radii. Watch.
Enter an option: 25-NOV-1991 15:10:28.03
OPTION=.CG(RADII=-0.538 1.5)
COMPARGAL, Version 3
....All the prompts are automatically
answered and the plot will appear with
a smaller range.
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